ZOOM TELEPHONICS, INC. ====================== 56K EXTERNAL V.34 Card Type Modem, Fax Chip Set Unidentified I/O Options Line in (RJ-11), line out (RJ11), DTE port (25-pin serial connector) Maximum Modem Rate 56.0Kbps Maximum Fax Rate 14.4Kbps Data Modulation Bell 103A/212A, ITU-T V.21, V.22, Protocol V.22bis,V.23, V.32, V.32bis, V.34, K56flex Fax Modulation V.17, V.21, CH2, V.27ter, V.29, V.33 Protocol Error MNP5, MNP10, V.42, V.42bis Correction/Compression Fax Class Class I & II Data Bus External +------------------------------------------------------------+ | CONNECTIONS | |------------------------------------------------------------| | Function | Label | Function | Label | |------------------------------------------------------------| | Power jack | CN1 | Line in | CN3 | |---------------------------------+---------+----------+-----| | DTE port (25-pin serial | CN2 | Line out | CN4 | | connector) | | | | +------------------------------------------------------------+ +------------------------------------------------------------+ | DIAGNOSTIC LED(S) | |------------------------------------------------------------| | LED | Color | Status | Condition | |------+--------------+----------+---------------------------| | OH | Unidentified | On | Modem is off-hook | |------+--------------+----------+---------------------------| | OH | Unidentified | Off | Modem is on-hook | |------+--------------+----------+---------------------------| | AA | Unidentified | On | Auto-answer enabled | |------+--------------+----------+---------------------------| | AA | Unidentified | Off | Auto-answer disabled | |------+--------------+----------+---------------------------| | AA | Unidentified | Blinking | Phone is ringing | |------+--------------+----------+---------------------------| | RD | Unidentified | On | Modem is receiving data | |------+--------------+----------+---------------------------| | RD | Unidentified | Off | Modem is not receiving | | | | | data | |------+--------------+----------+---------------------------| | TD | Unidentified | On | Modem is transmitting | | | | | data | |------+--------------+----------+---------------------------| | TD | Unidentified | Off | Modem is not transmitting | | | | | data | |------+--------------+----------+---------------------------| | TR | Unidentified | On | DTR signal is high | |------+--------------+----------+---------------------------| | TR | Unidentified | Off | DTR signal is low | |------+--------------+----------+---------------------------| | CD | Unidentified | On | Carrier signal detected | |------+--------------+----------+---------------------------| | CD | Unidentified | Off | Carrier signal not | | | | | detected | |------+--------------+----------+---------------------------| | CS | Unidentified | On | CTS signal is high | |------+--------------+----------+---------------------------| | CS | Unidentified | Off | CTS signal is low | |------+--------------+----------+---------------------------| | EC | Unidentified | On | Error correction enabled | |------+--------------+----------+---------------------------| | EC | Unidentified | Off | Error correction disabled | |------+--------------+----------+---------------------------| | DC | Unidentified | On | Data compression enabled | |------+--------------+----------+---------------------------| | DC | Unidentified | Off | Data compression disabled | |------+--------------+----------+---------------------------| | V.34 | Unidentified | On | Modem not connected in | | | | | V.34 mode | |------+--------------+----------+---------------------------| | V.34 | Unidentified | Off | Modem connected in V.34 | | | | | mode | |------+--------------+----------+---------------------------| | K56 | Unidentified | On | Modem connected at 56Kbps | |------+--------------+----------+---------------------------| | K56 | Unidentified | Off | Modem not connected at | | | | | 56Kbps | |------+--------------+----------+---------------------------| | FAX | Unidentified | On | Fax connection has been | | | | | made to remote fax modem | |------+--------------+----------+---------------------------| | FAX | Unidentified | Off | Fax connection has not | | | | | been made to remote fax | | | | | modem | |------+--------------+----------+---------------------------| | MSG | Unidentified | On | Faxes are waiting | |------+--------------+----------+---------------------------| | MSG | Unidentified | Off | Faxes are not waiting | |------+--------------+----------+---------------------------| | MR | Unidentified | On | Power is on | |------+--------------+----------+---------------------------| | MR | Unidentified | Off | Power is off | +------------------------------------------------------------+ +------------------------------------------------------------+ | SUPPORTED COMMAND SET | |------------------------------------------------------------| | Basic AT Commands | |------------------------------------------------------------| | AT, A/ | |------------------------------------------------------------| | A, B, E, H, M, O, P, Q, T, V, W, X, Y, Z | |------------------------------------------------------------| | &C, &T, &W, &Y, &Z | |------------------------------------------------------------| | Extended AT Commands | |------------------------------------------------------------| | %C, %L, %Q | |------------------------------------------------------------| | \A, \B, \G, \L, \N | |------------------------------------------------------------| | -K, -Q | |------------------------------------------------------------| | :E | |------------------------------------------------------------| | +MS | |------------------------------------------------------------| | S Registers | |------------------------------------------------------------| | S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, | | S14, S16, S18, S21, S22, S23, S24 | |------------------------------------------------------------| | S25, S26, S27, S28, S29, S31, S32, S33, S38, S40, S41 | |------------------------------------------------------------| | | |------------------------------------------------------------| | Note: See MHI Help File for full command documentation. | +------------------------------------------------------------+ PROPRIETARY AT COMMAND SET +------------------------------------------------------------+ | AUTO-MODE DETECTION | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] Nn [cmds] | |--------------+---------------------------------------------| | Description: | Enables/disbles automatic detection. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | N0 | Auto-mode detection disabled | |--------------+---------------------------------------------| | i N1 | Auto-mode detection enabled | +------------------------------------------------------------+ +------------------------------------------------------------+ | COMMUNICATIONS MODE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Mn [cmds] | |--------------+---------------------------------------------| | Description: | Selects communications mode | |--------------+---------------------------------------------| | Command | Mode | |--------------+---------------------------------------------| | &M0 | Asynchronous mode | +------------------------------------------------------------+ +------------------------------------------------------------+ | COMMUNICATIONS MODE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Qn [cmds] | |--------------+---------------------------------------------| | Description: | Selects communications mode options | |--------------+---------------------------------------------| | Command | Mode | |--------------+---------------------------------------------| | &Q0 | Asynchronous mode, serial port speed | | | follows connect speed. | |--------------+---------------------------------------------| | i &Q5 | Error correction mode | |--------------+---------------------------------------------| | &Q6 | Buffered asynchronous mode | +------------------------------------------------------------+ +------------------------------------------------------------+ | DATA SET READY (DSR) | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Sn [cmds] | |--------------+---------------------------------------------| | Description: | Selects DSR options | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | i &S0 | DSR forced high | |--------------+---------------------------------------------| | &S1 | DSR high only while modem is handshaking or | | | connected | +------------------------------------------------------------+ +------------------------------------------------------------+ | DATA TERMINAL READY (DTR) | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Dn [cmds] | |--------------+---------------------------------------------| | Description: | Selects modem response to DTR | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &D0 | Modem does not respond to DTR | |--------------+---------------------------------------------| | &D1 | Modem goes to command mode after DTR goes | | | is off | |--------------+---------------------------------------------| | i &D2 | Modem goes to command mode and disconnects | | | (hangs up) after DTR goes off; Auto-Answer | | | is disabled. | |--------------+---------------------------------------------| | &D3 | Modem is initialized after DTR goes off | +------------------------------------------------------------+ +------------------------------------------------------------+ | DIAL | |------------------------------------------------------------| | Type: | Immediate | |--------------+---------------------------------------------| | Format: | AT [cmds] D<#> [cmds] | |--------------+---------------------------------------------| | Description: | Dials telephone number according to any | | | modifiers included in the string | |--------------+---------------------------------------------| | Note: | Any combination of modifiers can be used to | | | produce the desired dial functions in | | | sequence. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | DL | Re-dial last number | |--------------+---------------------------------------------| | DP | Pulse dialing enabled | |--------------+---------------------------------------------| | DS=n | Dial stored telephone number n (0-3) | |--------------+---------------------------------------------| | DT | Tone dialing enabled/Pulse dialing disabled | |--------------+---------------------------------------------| | DW | Dialing resumed following dial tone | | | detection | |--------------+---------------------------------------------| | D, | Dialing paused for amount of time specified | | | in S8 register | |--------------+---------------------------------------------| | D! | Flash function initiated. Modem commanded | | | to go off-hook for specified time before | | | returning on-hook. | |--------------+---------------------------------------------| | D& | Waits for bong tone | |--------------+---------------------------------------------| | D@ | Wait for Quite Answer function enabled. | | | Modem waits until a "quiet answer," a | | | ring-back signal followed by silence up to | | | the time specified in S7, is received prior | | | to executing the rest of the dial string. | |--------------+---------------------------------------------| | D^ | Calling tone enabled | |--------------+---------------------------------------------| | D; | Modem returned to idle state after dialing. | | | The semicolon can only be placed at the end | | | of the dial command. | +------------------------------------------------------------+ +------------------------------------------------------------+ | GUARD TONE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Gn [cmds] | |--------------+---------------------------------------------| | Description: | Commands the modem to transmit a guard tone | | | in V.22/V.22bis | |------------------------------------------------------------| | Note: Used primarily for international data | | transmission | |------------------------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | i &G0 | Guard tone disabled | |--------------+---------------------------------------------| | &G1 | Guard tone disabled | |--------------+---------------------------------------------| | &G2 | 1800Hz guard tone enabled | +------------------------------------------------------------+ +------------------------------------------------------------+ | PULSE DIALING RATIO | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Pn [cmds] | |--------------+---------------------------------------------| | Description: | Selects pulse dial make/break ratio | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | i &P0 | 39/61ms at 10pps (North America) | |--------------+---------------------------------------------| | &P1 | Not used | |--------------+---------------------------------------------| | &P2 | Not used | |--------------+---------------------------------------------| | &P3 | Not used | +------------------------------------------------------------+ +------------------------------------------------------------+ | REPORT INFORMATION | |------------------------------------------------------------| | Type: | Immediate | |--------------+---------------------------------------------| | Format: | AT [cmds] In [cmds] | |--------------+---------------------------------------------| | Description: | Displays information requested | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | I0 | Reports four digit product code | |--------------+---------------------------------------------| | I1 | Reports ROM checksum | |--------------+---------------------------------------------| | I2 | Tests and reports ROM checksum | |--------------+---------------------------------------------| | I3 | Reports firmware revision code | |--------------+---------------------------------------------| | I4 | Reports identifier string | |--------------+---------------------------------------------| | I5 | Reports country code | |--------------+---------------------------------------------| | I6 | Reports data pump chipset revision | |--------------+---------------------------------------------| | I98 | Reports modem features description | |--------------+---------------------------------------------| | I99 | Reports modem features in hex bitmap | +------------------------------------------------------------+ +------------------------------------------------------------+ | SPEAKER VOLUME | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] Ln [cmds] | |--------------+---------------------------------------------| | Description: | Controls speaker volume | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | i L1 | Low volume setting | |--------------+---------------------------------------------| | L2 | Medium volume setting | |--------------+---------------------------------------------| | L3 | Highest volume setting | +------------------------------------------------------------+ +------------------------------------------------------------+ | TRANSMIT DATA FLOW CONTROL | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Kn [cmds] | |--------------+---------------------------------------------| | Description: | Enables TD flow control options | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &K0 | Flow control disabled | |--------------+---------------------------------------------| | i &K3 | RTS/CTS flow control enabled | |--------------+---------------------------------------------| | &K4 | XON/XOFF flow control enabled | |--------------+---------------------------------------------| | &K5 | Transparent XON/XOFF flow control enabled | |--------------+---------------------------------------------| | &K6 | Hardware and software flow control enabled | +------------------------------------------------------------+ EXTENDED AT COMMAND SET +------------------------------------------------------------+ | AUTO-RETRAIN - AUTO-FALLBACK/FALL-FORWARD | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] %En [cmds] | |--------------+---------------------------------------------| | Description: | Controls auto-retrain mode and | | | fallback/fall-forward | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | %E0 | Auto-retrain disabled | |--------------+---------------------------------------------| | %E1 | Auto-retrain enabled | |--------------+---------------------------------------------| | i %E2 | Auto-fallback/fall-forward enabled | |--------------+---------------------------------------------| | %E3 | Auto-retrain and fast hang up enabled | +------------------------------------------------------------+ +------------------------------------------------------------+ | BREAK TYPE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] \Kn [cmds] | |--------------+---------------------------------------------| | Description: | Configures action of break signal | +------------------------------------------------------------+ +---------------------------------------------------------------+ | CONNECT MESSAGE | |---------------------------------------------------------------| |Type: |Configuration | |------------+--------------------------------------------------| |Format: |AT [cmds] \Vn [cmds] | |------------+--------------------------------------------------| |Description:|Enables/disables single line connect message | |------------+--------------------------------------------------| | Command | Function | |------------+--------------------------------------------------| | \V=0 |Single line connect message disabled | |------------+--------------------------------------------------| | \V=1 |Single line connect message enabled. CONNECT | +---------------------------------------------------------------+ AT VOICE COMMAND SET +------------------------------------------------------------+ | DISTINCTIVE RING | |------------------------------------------------------------| | Format: | AT [cmds] -SDR=n [cmds] | |----------------+-------------------------------------------| | Default: | Unidentified | |----------------+-------------------------------------------| | Range: | 0 - 255 | |----------------+-------------------------------------------| | Description: | Selects which distinctive ring signals | | | the modem will respond to. | |------------------------------------------------------------| | Bit | Value | Function | |----------+-------+-----------------------------------------| | 0 | 0 | Distinctive ring disabled | |----------+-------+-----------------------------------------| | 1 | 0 | Do not respond to distinctive ring type | | | | 1. | | | 1 | | | | | Respond to distinctive ring type 1. | |----------+-------+-----------------------------------------| | 2 | 0 | Do not respond to distinctive ring type | | | | 2. | | | 1 | | | | | Respond to distinctive ring type 2. | |----------+-------+-----------------------------------------| | 3 | 0 | Do not respond to distinctive ring | | | | types 1 & 2. | | | 1 | | | | | Respond to distinctive ring types 1 & | | | | 2. | |----------+-------+-----------------------------------------| | 4 | 0 | Do not respond to distinctive ring type | | | | 3. | | | 1 | | | | | Respond to distinctive ring type 3. | |----------+-------+-----------------------------------------| | 5 | 0 | Do not respond to distinctive ring | | | | types 1 & 3. | | | 1 | | | | | Respond to distinctive ring types 1 & | | | | 3. | |----------+-------+-----------------------------------------| | 6 | 0 | Do not respond to distinctive ring | | | | types 2 & 3. | | | 1 | | | | | Respond to distinctive ring types 2 & | | | | 3. | |----------+-------+-----------------------------------------| | 7 | 0 | Do not respond to distinctive ring | | | | types 1, 2 & 3. | | | 1 | | | | | Respond to distinctive ring types 1, 2 | | | | & 3. | +------------------------------------------------------------+ +------------------------------------------------------------+ | DISTINCTIVE RING | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] $$Rn [cmds] | |--------------+---------------------------------------------| | Description: | Enables/disables distinctive ring | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | $$R0 | Distinctive ring disabled | |--------------+---------------------------------------------| | $$R1 | Distinctive ring enabled | +------------------------------------------------------------+ +------------------------------------------------------------+ | MNP10EC | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] -SECn, [cmds] | |--------------+---------------------------------------------| | Description: | Enable/disable MNP10EC | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | i -SEC0 | MNP10EC disabled | |--------------+---------------------------------------------| | -SEC1 | MNP10EC enabled | +------------------------------------------------------------+ S(status)-REGISTERS +------------------------------------------------------------+ | BREAK OPTIONS | |------------------------------------------------------------| | Type: | Register | |--------------+---------------------------------------------| | Format | AT [cmds] S82=n [cmds] | |--------------+---------------------------------------------| | Description: | Sets the method for break transmission | | | during error-control and ASB connections. | |------------------------------------------------------------| | Command | Function | |------------+-----------------------------------------------| | S82=3 | Expedited signaling, immediately send timed | | | break | |------------+-----------------------------------------------| | S82=7 | Destructive signaling, buffers cleared, | | | immediately send timed break | |------------+-----------------------------------------------| | S82=128 | In-sequence signaling, timed break sent in | | | sequence with transmitted data | +------------------------------------------------------------+ +------------------------------------------------------------+ | CONNECTION FAILURE CODES | |------------------------------------------------------------| | Type: | Register | |--------------+---------------------------------------------| | Format | AT [cmds] S86? [cmds] | |--------------+---------------------------------------------| | Description: | Reports codes which correspond to the | | | possible causes of a connection failure | |--------------+---------------------------------------------| | Value | Meaning | |--------------+---------------------------------------------| | 0 | Normal hang up | |--------------+---------------------------------------------| | 4 | Carrier signal lost | |--------------+---------------------------------------------| | 5 | No error-control detected for remote modem | | | during feature negotiation | |--------------+---------------------------------------------| | 6 | Remote modem failed to respond to feature | | | negotiation | |--------------+---------------------------------------------| | 7 | Local modem is asynchronous-only, remote | | | modem is synchronous-only | |--------------+---------------------------------------------| | 8 | No common framing technique found | |--------------+---------------------------------------------| | 9 | No common protocol found | |--------------+---------------------------------------------| | 10 | Remote modem sent erroneous feature | | | negotiation message | |--------------+---------------------------------------------| | 11 | Remote modem failed to send synchronous | | | information | |--------------+---------------------------------------------| | 12 | No failure - remote modem disconnected | | | normally | |--------------+---------------------------------------------| | 13 | Remote modem failed to respond after 10 | | | re-transmissions same message | |--------------+---------------------------------------------| | 14 | Violation of negotiated protocol caused | | | failure | +------------------------------------------------------------+ +------------------------------------------------------------+ | DCE LINE SPEED | |------------------------------------------------------------| | Type: | Register | |--------------+---------------------------------------------| | Format | AT [cmds] S37=n [cmds] | |--------------+---------------------------------------------| | Description: | Sets the maximum allowable data exchange | | | rate attempted during handshake process. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | S37=0 | Speed of last connection | |--------------+---------------------------------------------| | S37=1 | 300bps | |--------------+---------------------------------------------| | S37=2 | 300bps | |--------------+---------------------------------------------| | S37=3 | 300bps | |--------------+---------------------------------------------| | S37=4 | Reserved | |--------------+---------------------------------------------| | S37=5 | 1200bps | |--------------+---------------------------------------------| | S37=6 | 2400bps | |--------------+---------------------------------------------| | S37=7 | 75bps send, 1200bps receive | |--------------+---------------------------------------------| | S37=8 | 4800bps | |--------------+---------------------------------------------| | S37=9 | 9600bps | |--------------+---------------------------------------------| | S37=10 | 12.0Kbps | |--------------+---------------------------------------------| | S37=11 | 14.4Kbps | |--------------+---------------------------------------------| | S37=12 | 7200bps | +------------------------------------------------------------+ +------------------------------------------------------------+ | ERROR CORRECTION NEGOTIATION | |------------------------------------------------------------| | Type: | Register | |--------------+---------------------------------------------| | Format | AT [cmds] S36=n [cmds] | |--------------+---------------------------------------------| | Description: | Selects the action of the modem if it fails | | | to connect with the error-correction | | | protocol set in &Q. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | S36=0 | Hang up | |--------------+---------------------------------------------| | S36=3 | Attempt a buffered connection | |--------------+---------------------------------------------| | S36=4 | Attempt a connection at MNP2-4; if that | | | fails, hang up. | |--------------+---------------------------------------------| | S36=7 | Attempt a connection at MNP2-4; if that | | | fails, attempt a buffered connection. | +------------------------------------------------------------+ +------------------------------------------------------------+ | ERROR CORRECTION/COMPRESSION | |------------------------------------------------------------| | Type: | Register | |------------------------------------------------------------| | Format: | AT [cmds] S46=n [cmds] | |--------------+---------------------------------------------| | Description: | Selects active error correction and | | | compression protocols | |------------------------------------------------------------| | Command | Function | |---------------+--------------------------------------------| | S46=136 | LAP-M only, no compression | |---------------+--------------------------------------------| | S46=138 | LAP-M with V.42bis data compression | +------------------------------------------------------------+ +------------------------------------------------------------+ | EXTENDED RESULT CODES | |------------------------------------------------------------| | Type: | Register | |--------------+---------------------------------------------| | Format | AT [cmds] S95=n [cmds] | |--------------+---------------------------------------------| | Unit: | Bit-mapped | |--------------+---------------------------------------------| | Description: | Reports result codes | |--------------+---------------------------------------------| | Bit | Value | Function | |------+-------+---------------------------------------------| | 0 | 0 | CONNECT result code reports DTE speed. | | | | | | | 1 | CONNECT result code reports line speed | | | | instead DTE speed. | |------+-------+---------------------------------------------| | 1 | 0 | Verbose CONNECT result codes display DTE or | | | | line speed only. | | | 1 | | | | | Adds "/ARQ" to all verbose CONNECT result | | | | codes except "NONE." | |------+-------+---------------------------------------------| | 2 | 0 | CARRIER result codes disabled. | | | | | | | 1 | CARRIER result codes enabled. | |------+-------+---------------------------------------------| | 3 | 0 | PROTOCOL result codes disabled. | | | | | | | 1 | PROTOCOL result codes enabled. | |------+-------+---------------------------------------------| | 4 | 0 | Reserved | |------+-------+---------------------------------------------| | 5 | 0 | COMPRESSION result codes disabled. | | | | | | | 1 | COMPRESSION result codes enabled. | +------------------------------------------------------------+ +------------------------------------------------------------+ | FEATURE NEGOTIATION OPTIONS | |------------------------------------------------------------| | Type: | Register | |------------------------------------------------------------| | Format: | AT [cmds] S48=n [cmds] | |--------------+---------------------------------------------| | Description: | Selects active error correction and | | | compression protocols | |------------------------------------------------------------| | Command | Function | |---------------+--------------------------------------------| | S48=0 | Detection negotiation disabled, XID | | | negotiation disabled | |---------------+--------------------------------------------| | S48=7 | Detection negotiation and XID negotiation | | | enabled | |---------------+--------------------------------------------| | S48=128 | Fall-back to options set in S36 | +------------------------------------------------------------+ +------------------------------------------------------------+ | FLOW CONTROL | |------------------------------------------------------------| | Type: | Register | |--------------+---------------------------------------------| | Format | AT [cmds] S39? [cmds] | |--------------+---------------------------------------------| | Description: | Displays the current flow control | |--------------+---------------------------------------------| | Value | Meaning | |--------------+---------------------------------------------| | 0 | Flow control disabled | |--------------+---------------------------------------------| | 3 | RTS/CTS flow control enabled | |--------------+---------------------------------------------| | 4 | XON/XOFF flow control enabled | |--------------+---------------------------------------------| | 5 | Transparent XON/XOFF flow control enabled | |--------------+---------------------------------------------| | 6 | Hardware and software flow control enabled | +------------------------------------------------------------+